Chunghwa Telecom Announces Strategic Investment of USD 78,000 in Catalight Capital GP, L.P.

Release Date: July 10, 2026 Statement Date: July 9, 2026 Statement Time: 13:37:29 Company Code: 2412 Company Name: Chunghwa Telecom Subject: Announcement of Investment in Catalight Capital GP, L.P. Applicable Clause: Clause 24 Factual Date: July 9, 2026

1. Name and Nature of the Subject (if preferred shares, specify terms such as dividend rate): Catalight Capital GP, L.P.

2. Factual Date: 07/09/2026

3. Number of Units, Unit Price, and Total Transaction Amount: (1) Transaction Quantity and Unit Price: Not applicable (2) Total Transaction Amount: USD 78,000

4. Counterparty and Relationship with the Company (if the counterparty is a natural person and not a related party, name disclosure may be omitted): (1) Counterparty: Catalight Capital GP, L.P. (2) Relationship with the Company: None

5. If the counterparty is a related party, disclose the reason for selection, previous transferor, relationships among previous transferor, company, and counterparty, transfer date, and amount: Not applicable

6. If the subject’s owner was a related party of the company within the past five years, disclose the related party’s acquisition and disposal date, price, and relationship with the company at the time: Not applicable

7. Matters related to the disposal of receivables (including types of collateral attached to disposed receivables; if receivables from related parties, disclose names and book value): Not applicable

8. Gain (or loss) from disposal (not applicable for acquisition of securities; deferred gains/losses must be detailed): Not applicable

9. Delivery or payment terms (including payment schedule and amounts), contractual restrictions, and other important agreements: In accordance with the Limited Partnership Agreement

10. Decision-making process, pricing reference, and decision-making unit: (1) Decision method and pricing reference: In accordance with the Limited Partnership Agreement (2) Decision-making unit: As per the company’s authorization regulations

11. Net asset value per share of the securities-issuing company: Not applicable

12. Private placement reference price of the securities-issuing company differs from transaction price per share by over 20%: Not applicable

13. Cumulative holdings (including this transaction) of the securities: quantity, amount, ownership percentage, and restricted rights (e.g., pledge status): (1) Cumulative quantity: Not applicable (2) Cumulative amount: USD 78,000 (3) Cumulative ownership percentage: Not applicable (4) Restricted rights: None

14. Proportion of private placement securities investments (including this transaction) to total assets and equity attributable to owners of the parent in the latest financial statements, and the amount of working capital: (1) Proportion to total assets: 0.30% (2) Proportion to equity attributable to owners of the parent: 0.39% (3) Working capital in latest financial report: NT$14,609,081 thousand

15. Manager and brokerage fees: Not applicable

16. Specific purpose or use of the acquisition or disposal: Strategic investment

17. Dissenting directors’ opinions on this transaction: Not applicable

18. Whether this transaction is a related-party transaction: No

19. Board approval date: Not applicable

20. Supervisor approval or audit committee consent date: Not applicable

21. Whether auditors issued a non-reasonableness opinion on this transaction: Not applicable

22. Name of accounting firm: Not applicable

23. Name of auditor: Not applicable

24. Auditor’s license number: Not applicable

25. Other disclosures: This transaction is denominated in USD. The NT dollar amount is calculated at an exchange rate of USD:NTD = 1:31.